| South Charleston to Olympia (Washington) | 2,148.65 mi (3,457.92 km) |
| South Charleston to Olympia Heights (Florida) | 875.55 mi (1,409.06 km) |
| South Charleston to Omaha (Nebraska) | 786.30 mi (1,265.43 km) |
| South Charleston to On Top of the World Designated Place (Florida) | 639.04 mi (1,028.44 km) |
| South Charleston to Onalaska (Wisconsin) | 624.57 mi (1,005.14 km) |
| South Charleston to Oneida (New York) | 455.29 mi (732.72 km) |
| South Charleston to Oneonta (New York) | 450.46 mi (724.94 km) |
| South Charleston to Ontario (California) | 2,010.53 mi (3,235.64 km) |
| South Charleston to Ontario (Oregon) | 1,860.15 mi (2,993.63 km) |
| South Charleston to Opa-locka (Florida) | 863.92 mi (1,390.35 km) |
| South Charleston to Opelika (Alabama) | 443.19 mi (713.24 km) |
| South Charleston to Opelousas (Louisiana) | 799.43 mi (1,286.56 km) |
| South Charleston to Orange (California) | 2,027.55 mi (3,263.02 km) |
| South Charleston to Orange (Texas) | 890.79 mi (1,433.58 km) |
| South Charleston to Orange City (Florida) | 650.48 mi (1,046.84 km) |
